HVAC Services Greencastle PA | Call G.W. Penn heating and air conditioning

In the Greencastle area, with its seasonal pollen and dust, we recommend checking your standard 1-inch air filter every month and changing it at least every 90 days. During high-pollen seasons like spring and fall, or if you have pets, monthly changes are often necessary to maintain airflow, efficiency, and your indoor air quality.

Common signs your AC may be low on refrigerant include reduced cooling power, longer running times to reach the set temperature, ice forming on the refrigerant lines or evaporator coil, and a noticeable hissing or bubbling sound from the unit. If you notice these, it's time to call for service, as running a system low on refrigerant can cause serious damage.

Absolutely. A professional seasonal tune-up is the best defense against Greencastle's common HVAC problems. Our maintenance includes cleaning coils, checking refrigerant levels and pressure to catch small leaks early, inspecting and cleaning drain lines, and of course, checking/replacing your air filter. This proactive care improves efficiency, extends system life, and helps avoid unexpected repairs.